Catholic Church. Pope (1963-1978 : Paulus VI). (1971). Apostolic letter Octogesima adveniens / of His Holiness Pope Paul VI, to Maurice Cardinal Roy ... on the occasion of the eightieth anniversary of the Encyclical Rerum novarum. Catholic Truth Society.
Chicago Style (17th ed.) CitationCatholic Church. Pope (1963-1978 : Paulus VI). Apostolic Letter Octogesima Adveniens / of His Holiness Pope Paul VI, to Maurice Cardinal Roy ... on the Occasion of the Eightieth Anniversary of the Encyclical Rerum Novarum. London: Catholic Truth Society, 1971.
MLA引文Catholic Church. Pope (1963-1978 : Paulus VI). Apostolic Letter Octogesima Adveniens / of His Holiness Pope Paul VI, to Maurice Cardinal Roy ... on the Occasion of the Eightieth Anniversary of the Encyclical Rerum Novarum. Catholic Truth Society, 1971.